Denatured alcohol containing aldol



hyde selected from the Patented June 4, 1940 ST TES UNIT r ECE DENATURED ALCOHOL CONTAINING ALDOL No Drawing. Application October 6, 1937, Serial No. 167,616

1 Claim.

This invention relates to the denaturing of ethyl alcohol, and to alcohol so denatured.

It is an object of my invention to provide a denaturant which will render ethyl alcohol containing it unfit for use as a beverage, which cannot be economically removed from the alcohol by any known methods, which will not render the alcohol unfit for industrial uses in which denatured alcohol has customarily been employed, and which will be free from methanol. Other objects will hereinafter appear.

I have discovered that a lower aliphatic aldegroup consisting of aldol, CI-I3.CH(OI-l) .CH2.CHO-, butyl aldehyde CSH'LCHO, and paraldehyde, COHl203, is an efiective denaturant for alcohol. A particular advantage of aldol as a denaturant is that when alcohol 3' containing it is heated in an attempt to eliminate the denaturant, the aldol breaks down to give crotonaldehyde, which renders the alcohol even more undrinkable. In denaturing ethyl alcohol with my novel denaturants, I may use from 0.5

to 5 parts of the lower aliphatic aldehyde, or even more, per 100 parts of alcohol.

These lower aliphatic aldehydes may be used alone in denaturing, or they may be used in conjunction with denaturing materials derived from the destructive distillation of hardwood, such as those which are described in my U. S. Patents Nos. 1,975,090; 1,975,091; and 1,975,092. While I may use a mechanical mixture of the aldehye with these hardwood denaturants, I prefer to introduce the aldehyde, along with the hardwood denaturant oils, into the upper portions of a bubble-cup iractionating column, where they are met by the ascending vapors of ethyl alcohol or of a mixture of ethyl alcohol and denaturing grade isopropanol, in the manner which is fully set forth in my Patent 1,975,091. One or more of the aldehydes may be used. The proportions may vary widely.

Example I As an illustrative example, I may introduce The light acid oil and washed alcohol oil and the allyl alcohol fraction referred to are described in my U. S. Patent 1,975,091; Neutral oil is made by adding a 15.0% solution of sodium hydroxide to hardwood creosote oils and separating the wood oils which are insoluble in the sodium hydroxide solution. The separated oil is then given a vacuum distillation to stabilize it to a lemon-yellow color.

Other examples of the use of my novel aldehyde denaturants with hardwood denaturants follow:

Example II Percent by volume Ethyl alcohol 34.75 Isopropyl alcohol 34.60 Light acid and washed alcohol oils 5.25 Allyl alcohol fraction 1.50 Wood turpentine 2.50 Aldol 8.40 Paraldehyde 10.00 Ethyl acetate 1.00 Water 2.00

Example III Percent by volume Ethyl alcohol 45.38 Isopropyl alcohol 22.69 Light acid and washed alcohol oils 4.25 Allyl alcohol fraction 1.50 Wood turpentine 0.72 Neutral oil from hardwoods 2.75 Aldol 22.68

Example IV Percent by volume Ethyl alcohol 22.65 Isopropyl alcohol 10.00 Light acid and washed alcohol oils 4.25 Allyl alcohol fraction 1.50 Wood turpentine 5.00 Neutral oil from hardwoods 2.00 Aldol 15.00 Octyl alcohol 10.00 Ethyl acetate 30.00

Example V Percent by volume Ethyl alcohol 27.25 Isopropyl alcohol 10.00 Light acid and washed alcohol oils 4.25 Allyl alcohol fraction 1.50 Wood turpentine 5.00 Neutral oil from hardwoods 2.00 Aldol 10.00 Ethyl acetate 30.00

Amyl-isoamyl alcohol mixture 10.00

Example VI Example X Percent Percent by volume by volume Ethyl alcohol 32.25 Light acid and washed alcohol oils 4.00 Isopropyl alcohol- 10.00 Allyl alcohol fraction 3.00 5 Light acid and washed alcohol oils 4.25 Isopropyl alcohol 4.25 Allyl alcohol fraction 1.50 Water 1.50 Wood turpentine 5.00 Methyl propyl ketone 68.50 Neutral oil from hardwoods 2.00 Paraldehyde 19.00 Aldol 15.00 10 Ethyl acetate 30.00 Emmp'le XI Di-isopropyl ether 0 Example VII Methyl propyl ketone Ethyl alcohol 5.6.75 Paraldehyde 15 Isopropyl alcohol 10.00 Light acid and washed alcohol oils 4.25 Example Allyl alcohol fraction 1.50 Isopropyl alcohol 15 Wood turpentine 5.00 Di-isopropyl ether '10 Neutral oil from hardwoods 2.50 Paraldehyde Aldol 10.00 Picoline 10.00 Example XIII Moreover, my novel aldehyde denaturants may gifig gfgg i be used in conjunction with aliphatic ketones, or with ethers, or with a mixture of ketones and Example XIV 25 others, or with amino compounds, or with any other denaturants with which they may be found ethyl alcohol e; to be compatible. For instance, I may use the 5221 2 gfi 5"- following comblnatlons of denaturants. Washed alcohol 011 300 so Eva-ample VH1 Allyl alcohol fraction Percent Aldol 10- by Volume Paraldehyde 0-0 Light acid and washed alcohol oils 4.00 Isopropyl ether 10'00 Allyl alcohol fraction From 0.5 to 5 parts, or even more, of any of 35 Isopropyl alcohol 425 the combinations mentioned above, may be used W per parts of 95% alcohol. When paraldel: Dllsopmpyl ether hyde is used, not more than 1 part of the de- Methy] Propyl ketone 61-75 naturant combination per 100 parts of 95% Paraldehyde 1900 alcohol is necessary, although more may be used if desired. Example IX What I claim as my invention and desire to be L t a d a W d a co O secured by Letters Patent of the United States is: Allyl alcohol fraction Industrial ethyl alcohol denatured with 0.5 to Isopropyl alcohol 23-75 5 parts of aldol, as an essential denaturing ele- Water ment, per 100 parts of 95% ethyl alcohol.

-1 Di-isopropyl ether 10-00 Paraldehyde LOUIS J. FIGG, JR. 

